ps3vram: convert to blk_alloc_disk/blk_cleanup_disk

Convert the ps3vram driver to use the blk_alloc_disk and blk_cleanup_disk
helpers to simplify gendisk and request_queue allocation.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20210521055116.1053587-23-hch@lst.deSigned-off-by: Jens Axboe <axboe@kernel.dk>

drivers/block/ps3vram.c

@@ -67,7 +67,6 @@ struct ps3vram_cache {
 };
 
 struct ps3vram_priv {
-	struct request_queue *queue;
 	struct gendisk *gendisk;
 
 	u64 size;
@@ -613,7 +612,6 @@ static int ps3vram_probe(struct ps3_system_bus_device *dev)
 {
 	struct ps3vram_priv *priv;
 	int error, status;
-	struct request_queue *queue;
 	struct gendisk *gendisk;
 	u64 ddr_size, ddr_lpar, ctrl_lpar, info_lpar, reports_lpar,
 	    reports_size, xdr_lpar;
@@ -736,33 +734,23 @@ static int ps3vram_probe(struct ps3_system_bus_device *dev)
 
 	ps3vram_proc_init(dev);
 
-	queue = blk_alloc_queue(NUMA_NO_NODE);
-	if (!queue) {
-		dev_err(&dev->core, "blk_alloc_queue failed\n");
-		error = -ENOMEM;
-		goto out_cache_cleanup;
-	}
-
-	priv->queue = queue;
-	blk_queue_max_segments(queue, BLK_MAX_SEGMENTS);
-	blk_queue_max_segment_size(queue, BLK_MAX_SEGMENT_SIZE);
-	blk_queue_max_hw_sectors(queue, BLK_SAFE_MAX_SECTORS);
-
-	gendisk = alloc_disk(1);
+	gendisk = blk_alloc_disk(NUMA_NO_NODE);
 	if (!gendisk) {
-		dev_err(&dev->core, "alloc_disk failed\n");
+		dev_err(&dev->core, "blk_alloc_disk failed\n");
 		error = -ENOMEM;
-		goto fail_cleanup_queue;
+		goto out_cache_cleanup;
 	}
 
 	priv->gendisk = gendisk;
 	gendisk->major = ps3vram_major;
-	gendisk->first_minor = 0;
+	gendisk->minors = 1;
 	gendisk->fops = &ps3vram_fops;
-	gendisk->queue = queue;
 	gendisk->private_data = dev;
 	strlcpy(gendisk->disk_name, DEVICE_NAME, sizeof(gendisk->disk_name));
 	set_capacity(gendisk, priv->size >> 9);
+	blk_queue_max_segments(gendisk->queue, BLK_MAX_SEGMENTS);
+	blk_queue_max_segment_size(gendisk->queue, BLK_MAX_SEGMENT_SIZE);
+	blk_queue_max_hw_sectors(gendisk->queue, BLK_SAFE_MAX_SECTORS);
 
 	dev_info(&dev->core, "%s: Using %llu MiB of GPU memory\n",
 		 gendisk->disk_name, get_capacity(gendisk) >> 11);
@@ -770,8 +758,6 @@ static int ps3vram_probe(struct ps3_system_bus_device *dev)
 	device_add_disk(&dev->core, gendisk, NULL);
 	return 0;
 
-fail_cleanup_queue:
-	blk_cleanup_queue(queue);
 out_cache_cleanup:
 	remove_proc_entry(DEVICE_NAME, NULL);
 	ps3vram_cache_cleanup(dev);
@@ -802,8 +788,7 @@ static void ps3vram_remove(struct ps3_system_bus_device *dev)
 	struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 
 	del_gendisk(priv->gendisk);
-	put_disk(priv->gendisk);
-	blk_cleanup_queue(priv->queue);
+	blk_cleanup_disk(priv->gendisk);
 	remove_proc_entry(DEVICE_NAME, NULL);
 	ps3vram_cache_cleanup(dev);
 	iounmap(priv->reports);